Door-key-securing device.



M. w. ROSE-NSHINE.

DOOR KEY SECURING DEVICE.

APPLICATION HLED NOV. 10. I915.

Patented July 11, 1916.

Wl'lN ESSES:

STATES PATENT OF TC.

MORRIS W. ROSENSI-IINE, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OFONE-HALF T0 HERBERT E. CLAYBURGI-I, OF SAN FRANCISCO, CALIFORNIA.

DOOR-KEY-SECURING DEVICE.

Application filed November 10, 1915.

To all whom it may concern Be it known that I, MORRIS W. RosnN- SHINE, acitizen of the United States, residing in the city and county of SanFrancisco and State of California, have invented new and usefulImprovements in Door-Key-Securing Devices, of which the following is aspecification.

My invention relates to a means for securing keys in a lock in such amanner as to prevent their being easily removed if left after the doorhas been locked.

It consists of an elastic two-part shank of the key so constructed thatit may readily enter the hole in the escutcheon of the lock, having anarrower portion with shoulders engaging the edge of the escutcheon sothat the key cannot be removed from the outside.

The invention consists of the parts and the construction and combinationof parts as hereinafter more fully described and claimed, havingreference to the drawings, in which Figure 1 shows a vertical centralsectional view of a lock, applied to which is'a key embodying myinvention. Fig. 2 shows a similar view with the key turned to presentits edges. Fig. 3 shows a sectional view taken on the line 33 of Fig. 1.

As shown in the drawings, the shank A of the key is provided with wards2, adapted to engage with the tumblers of the lock B in the usualmanner. The outer end of the shank has attached to it two elastic arms33, one upon each side forming together a rectangular outline which isof just suflicient size to enter the circular part of the escutcheonopening C. This portion of the key is just long enough to enter the lockSpecification of Letters Patent.

Patented July 11, 1916.

Serial No. 60,666.

when the wards are in proper position, and exterlor to the ends of theportions 3, the metal is cut away until it forms shoulders 4, which willenter the key hole, and will there expand and engage the circularportion of the key hole as soon as the pressure upon the outer end 5 ofthe key is released. 'Thus, when the key has been turned and the locksecured, the key may be left in the lock and cannot be removed by anymanipulation from the outside, because the shoulders 41 are expansiblyengaged with the edge of the key hole. The key may be left in the lookat all times if desired, and whether the door be locked or unlocked, thekey will remain in place and cannot be lost. In order to remove the keyit is necessary to press upon the two separate sides 5, which will drawthe parts 33 toward each other sufficiently to allow them to pass outthrough the key hole, so that the key may be removed.

Having thus described my invention what I claim and desire to secure byLetters Patent is The combination in a key of a shank hav ing wards tofit the lock, elastic plates secured to' the inner end of the shank,said plates arranged to form a rectangular outline and having shouldersformed at the outer ends and extensions terminating in compressiblehand-grips.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

MORRIS W. ROSENSHINE.

Witnesses:

JOHN H. HERRING, W. W. HEALEY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

